Samsung PS42D51SX/XEC, Service Manual

Page: 112 / 118

Reference Information
Samsung Electronics 14-1
14. Reference Information
14-1 Other issues related to other products
Problem Descriptions
A fixed screen can cause
permanent damage to the TV
Braun tube.
Braun, PDP and LCD TVs can all be damaged. When a still image is displayed in a sequence,
this can leave stains or after-images due to the characteristics of the panel.
However, the DLP TV has the advantage that no stains or after-images are left on the screen.
The DLP TV has mirror pixels on the DMD panel that project the beam onto the screen, in
which the mirror is a digital representation of 0s and 1s, leaving no trace of light.
The mirror returns to a blank state so that no stains or after-images are left.
Length of DVI Cable / PC RGB
Cable
- A too long DVI cable may cause a malfunction or degradation of the visual quality due to an
attenuation of the signal. There is no recommendation for the cable length at present.
In general, although a cable length of up to 5 meters should work, please check if video is
properly displayed on the screen after connecting. If you think the length of the cable is longer
than for normal use, check the visual quality of the video on the screen and shorten the
length, if necessary.
- This also applies to the PC RGB (D-Sub) cable. When the length of the cable is longer than
for normal use, video may not be displayed on the screen. In this case, shorten the cable
length.
When a digitally distributed TV
user receives HD-rated
broadcasts: The digital distributed TV (Ready Technique) can render HD sources as HD-rated.
However, you need to install a set-top box for this purpose. The digital TV alone cannot render
HD broadcasting as HD-rated. Install the formal set-top box for HD broadcasts.
When a digital distributed TV
user selects normal size (4:3) to
receive SD-rated digita
broadcasts:
The digitally distributed TV (Ready Technique) renders any broadcasting service as SD-rated.
However, when connected to a set-top box, the digital TV renders HD broadcasts as HD-rated
and renders SD as SD-rated. The screen size is scaled to 4:3.
When a digitally built-in TV user
receives SD (air) broadcasting:
The digitally integrated TV ("built-in" type) renders SD broadcasting as SD-rated.
This can be understood easily.
Even a high-resolution TV cannot improve a low resolution picture into high quality.
In contrast, an SD-rated TV cannot represent HD broadcasting as HD because the resolution of
the TV is lower than the original.
When selecting a picture size of
4:3 in connection with a
computer or a multimedia
device:
The representation capability of SD or HD-rated depend entirely on the TV set. The HD TV can
render HD broadcasting as HD-rated only when it receives HD sources.
In the meantime, the HD TV renders SD as SD-rated when it receives SD sources.
The picture size has nothing to do with the resolution; TV models like SVP-XXL3HD or
SVP-XXL6HD have a size adjustment feature to 16:9, 4:3, Panorama, Zoom1, Zoom2 and Auto
Wide. This is about the aspect ratio of the top and bottom boundaries to the overall screen and
users can select their preference.